Free Software
(written by me)

I very much enjoy computer programming. While most of my programming has been scientific, here are some utilities, listed and described below, perhaps you'll find at least one useful. You are free to download them. Below is a short description of each and a link to documentation, which then leads you to the 2 main locations (mainly Sourceforge, sometimes Github) where I place software for download.

Questions? Drop me an email. see bottom of page

Pfactris

Pfactris: Arithmetical Tetris

Each tile has an integer on it and you make tiles vanish by dropping a tile onto a tile below so that the numbers cancel by dividing each other.

Works on MS Windows, Mac/Apple and Linux.

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Popppy

Popppy: Population Propagation in Python

A human population model with animated graphics, to predict growth of a population over time with tweakable input parameters such as mean infant mortality rate, mean number of children, and distributions for marriage age, mortality (non-infant) and child bearing. Also shows emissions from the population.

Works on MS Windows, Mac/Apple and Linux with Python 3. Non-Python version for MS Windows available.

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Duem

A simple Python based utility to emulate the Unix du command, with several improvements. Recusrively descends and shows how much disk space is used by a directory/folder and number of files and their disk usage in the directory tree below.

Works on MS Windows, Mac/Apple and Linux/Unix. Non-Python version for MS Windows available

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Jeeva

This is a file/directory utility for:

• Comparing two directories/folders or directory trees. File sizes, contents and modifications can be compared.
• Mirroring directories. Quick simple copy to another location. Primarily useful for keeping a mirror on another hard drive or for frequent copying to a USB stick. Has a short copying time as allows one to selectively copy over to the destination directory only those files that are newer in source than in the destination directory; useful when the total number of files is large but the number of newer files is relatively small.

Works on MS Windows, Mac/Apple and Linux. Precompiled binaries for MS Windows and for Linux users who have not yet switched to Python 3 are available.

Older manual for v1.6

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Delayter

Sometimes you have files that can be deleted weeks or months from now but you do not feel comfortable deleting right now. With Delayter you specify file names and a time for delayed deletion.

Useful on projects with many temporary junk files that cannot be deleted until a later time. At which you might not remember whether they are important or not. Or even what they are.

There are some safeguards to protect against accidental deletion. Files will not be deleted if they have been modified since scheduled for deletion. Scheduled deletions can be viewed and also retracted. If interested, read further

Works on MS Windows, Mac/Apple and Linux/Unix. Non-Python version for MS Windows available

Older manual for v4.1

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Egof

I don't recommend this unless you are a programmer, and perhaps not even then. I myself find it extremely useful. If all this makes you curious, read further.

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Turtle

Fun with the Turtle Graphics module that is included with Python. A handful of small scripts that do simple animated stuff. Possibly a nice way to get a child/teenager interested in Python programming.

Works on any platform with Python

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Clipstitch

A utility for making movies from digital camera (or phone) video files. Useful for MS WIndows and Linux/Unix users. Not necessary for Apple/Mac users who can use Apple's IMovie.

FFmpeg is a professional-quality, free, open-source program for audio and video editing, with the ability to implement a huge number of operations and handle every data format! This kind of ability comes at a cost: its commands are quite complex-looking and difficult to use and remember.

Clipstitch runs as a front-end to ffmpeg so that you use only the sub-set of ffmpeg commands necessary for making a home movie from your digital camera, puts them in easier-to-read form, and internally combines multiple ffmpeg commands to do certain tasks.. You can put Clipstitch commands into a text file and run as a script or type them in manually at a prompt.

It allows you to:

• Select portions of motion files taken with your camera, with optional fade-in/fadeout, slowmo/speedup, reverse play backwards, captions.
• Adjust the order of the clips
• Concatenate them to make your final "movie".

Works with Python on MS Windows, Mac/Apple and Linux. Non-Python pre-compiled executables for Linux and MS Windows available.

Older version 3.5 documentation.

Older version 5.3 documentation.

Older version 5.5 documentation.

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Yellah

A desktop timer program, let's you keep commonly used timers of various types on your computer desktop. As you can see from the image, it is GUI-based with 2 windows:

• a Display Window that has one or more timer program concurrently running timers going
• a Timer List Window from which you choose new timers either setup your own, or use a pre-specified one

Works on MS Windows, Mac/Apple and Linux with Python 3 and WxPython. Non-Python version for MS Windows available.

Older version 1.4 documentation, written in Python 2.7.

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